EP0572237B1 - Pistolet de pulvérisation avec gâchette à double mode de fonctionnement - Google Patents

Pistolet de pulvérisation avec gâchette à double mode de fonctionnement Download PDF

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Publication number
EP0572237B1
EP0572237B1 EP93304087A EP93304087A EP0572237B1 EP 0572237 B1 EP0572237 B1 EP 0572237B1 EP 93304087 A EP93304087 A EP 93304087A EP 93304087 A EP93304087 A EP 93304087A EP 0572237 B1 EP0572237 B1 EP 0572237B1
Authority
EP
European Patent Office
Prior art keywords
trigger
spray gun
piston
operating mode
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93304087A
Other languages
German (de)
English (en)
Other versions
EP0572237A1 (fr
Inventor
Thomas E. Grime
James P. Baltz
Roger T. Cedoz
John F. Schaupp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ransburg Corp
Original Assignee
Ransburg Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/894,730 external-priority patent/US5236129A/en
Application filed by Ransburg Corp filed Critical Ransburg Corp
Publication of EP0572237A1 publication Critical patent/EP0572237A1/fr
Application granted granted Critical
Publication of EP0572237B1 publication Critical patent/EP0572237B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0081—Apparatus supplied with low pressure gas, e.g. "hvlp"-guns; air supplied by a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/306—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B05B7/1218—With means for adjusting or modifying the action of the controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
    • B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
    • B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas

Definitions

  • the invention relates to paint spray guns and more particularly to a hand held paint spray gun in which the trigger has two operating modes for turning the gun on and off.
  • a typical prior art hand held paint spray gun having the features of the prior art portion of claim 1 is, e.g., known from US-A-3 396 911 and includes a gun body having a nozzle assembly mounted on one end and having a handle depending from adjacent an opposite end.
  • a trigger is attached to the gun body to pivot towards and away from the handle.
  • an air valve is opened and then a valve needle is moved to open a fluid valve.
  • the air valve supplies any air required for atomization and for shaping the spray pattern. If the trigger is only partially squeezed, the fluid valve may be only partially opened to permit the operator to apply a lighter coating, for example, for feathering when touching up a coating.
  • the spray gun also includes an adjustable stop which limits either trigger travel or the valve needle travel to adjust the maximum paint flow from the gun when the trigger is fully squeezed.
  • the trigger has a relatively long travel. Consequently, the operator's fingers must move the trigger over a relatively large arc when squeezing or releasing the trigger. Also, a relative high force has been required to overcome friction when squeezing the trigger and to assure that the gun turns off when the trigger is released.
  • An aim of the present invention is to provide an improved hand held spray gun having a trigger with dual operating modes which reduces stress on the finger and hand of an operator.
  • a hand held liquid spray gun including a gun body having first and second ends, a liquid atomization nozzle assembly secured to the first end, a handle extending from adjacent the second end for holding the spray gun and a main trigger for controlling the discharge of liquid from the spray gun, the spray gun trigger having first and second operating modes, first means responsive to trigger movement for varying the amount of liquid discharged from the spray gun as a function of trigger movement when the trigger is in the first operating mode, and second means responsive to a predetermined small trigger movement when the trigger is in the second operating mode for turning fully on and off the flow of liquid discharged from the spray gun.
  • the spray gun 10 generally includes a body 11 having a front end 12 to which a fluid nozzle assembly 13 is secured and having a rear end 14.
  • a knob 15 is secured to the rear body end 14 for adjusting the maximum flow of paint from the gun 10.
  • a handle 16 depends from the body 11 adjacent the rear end 14.
  • a fluid hose 17 and a compressed air hose 18 are shown secured to a lower free end 19 of the handle 16.
  • the spray gun 10 is shown as having a main trigger 21 and an optional auxiliary trigger 22.
  • the main trigger 21 is mounted to pivot towards and away from the handle 16 and the auxiliary trigger is mounted to pivot towards and away from a top 23 of the gun body 11.
  • the main trigger 21 has two distinct operating modes.
  • the trigger 21 When the trigger 21 is positioned in the first operating mode as shown in solid lines and an operator gradually squeezes the trigger 21, a mechanical linkage mounted on the gun body 11 gradually opens a valve needle to provide an increasing flow of fluid to the nozzle assembly 13.
  • the trigger 21 For the second operating mode, the trigger 21 is pushed radially upwardly towards its pivot point on the gun body 11 and is moved towards the handle 16 to the position shown by the dashed lines 24.
  • the trigger 21 engages and moves a push bar 25 to open a valve in the gun body. Opening the valve causes a piston to be pneumatically moved to turn the spray gun 10 fully on.
  • the spray gun 10 When the trigger 21 is released, the spray gun 10 is turned off.
  • the trigger 21 may be pivoted forward to the position shown by the dashed line 26.
  • an area 27 between the trigger 21 and the handle 16 is opened up to permit the operator to grasp the gun body 11 in the area 27 for using the auxiliary trigger 22.
  • the auxiliary trigger 22 is particularly useful when the spray gun 10 is aimed downwardly from painting generally horizontal surfaces.
  • the spray gun 10 Details of the spray gun 10 are shown in the cross sectional view of Fig. 2.
  • a moulded plastic skeleton 28 and an outer cover 29 form the gun body 11 and the handle 16 as an integral unit.
  • the nozzle assembly 13 consists of a spray head 30 secured to the front body end 12 by a head retaining ring 31 and an air cap 32 secured to the spray head 30 by a retaining ring 33.
  • the air hose 18 is connected to a passageway 34 in the handle 16.
  • the fluid hose 17 passes through a passageway 35 in the skeleton 28 and connects to a passage 36 in the spray head 30.
  • the passage 36 connects with a chamber 37 which leads to a fluid discharge orifice 38.
  • a valve needle 39 is seated in the spray head 30 to close the orifice 38.
  • the valve needle 39 extends axially through the gun body 11 to the knob 15.
  • Pressurised air is delivered to the handle passageway 34 from the air hose 18.
  • a front surface 40 on a piston 41 is normally seated against a surface 42 on an air valve bushing 43 to block the flow of air to a passageway 44 in the gun body 11.
  • the passageway 44 is connected for delivering atomization air and pattern shaping air to the spray head 30 and thence to the air cap 32.
  • a knob 45 on the gun body 11 controls a pattern shaping air valve 46 to control the discharge of such air from pattern shaping orifices 47 on the air cap 32.
  • the piston 41 is part of a piston assembly 48 which includes an air valve stem 49, a compression spring 50, a retainer ring 51, a valve needle seal 52 and a plate 53.
  • the piston 41 has a stepped axial bore 54.
  • the air valve stem 49 is generally tubular and slides in an axial direction in the piston bore 54.
  • An enlarged diameter end flange 55 retains the air valve stem 49 in the bore 54.
  • the retainer ring 51 is an internal retainer ring which engages the piston bore 54.
  • the compression spring 50 is compressed between the air valve stem flange 55 and the retainer ring 51.
  • the seal 52 preferably has a U-shaped cross section and forms a low friction sliding seal between the piston 41 and the valve needle 39 which extends axially through the piston assembly 48.
  • the seal 52 is retained by the plate 53.
  • a compression spring 56 presses against the plate 53 to cause the piston surface 40 to seat against the surface 42.
  • a T-block 57 is positioned to slide in an axial direction on the valve needle 39 forward of the air valve stem 49.
  • the T-block 57 has an opening 58 through which the valve needle 39 passes and has two radially directed lugs 59.
  • Side portions 60 on an actuator arm 61 are moved to engage the lugs 59 for in turn moving the valve needle 39 to turn on the spray gun 10 when it is operated in a first mode.
  • squeezing either the trigger 21 or the auxiliary trigger 22 rotates the actuator arm 61 to urge the T-block 57 towards the rear end 14 of the gun body 11. This pushes on the air valve stem 49, moving the piston surface 40 clear of the surface 42 on the air valve bushing 43. Air then flows between the surfaces 40 and 42 to the passageway 44 and is discharged from the nozzle assembly 13 for atomizing fluid and for shaping the pattern of the atomised fluid in a known manner.
  • the plate 53 contacts a collar 62 which is secured to the valve needle 39. Further movement of the piston assembly 48 causes the valve needle 39 to move and pressurised fluid from the fluid hose 17 is discharged from the orifice 38 and atomised.
  • the spacing between the piston assembly 48 and the collar 62 when the spray gun 10 is off assures that the flow of atomization and pattern shaping air will start prior to the discharge of fluid from the orifice 38. The amount of fluid discharged will depend on various factors, such as the fluid pressure, the size of the orifice 38, the distance that the valve needle 39 is moved and the properties of the fluid.
  • a rear plug 63 is secured to the rear body end 14 and the knob 15 is threaded into the rear plug 63.
  • the knob 15 forms an adjustable stop against which the collar 62 abuts when the fluid valve is fully opened. Rotating the knob 15 adjusts the maximum travel of the valve needle 39 when the fluid valve is opened.
  • An annular seal 64 fits between the knob 15 and the rear plug 63.
  • the spring 56 extends between the plate 53 and the seal 64. The spring 56 functions both as a return spring for the piston assembly 48 and as a spring for maintaining a force on the seal 64 to form a self adjusting air tight seal between the rear plug 63 and the knob 15.
  • the spring 56 is located in a chamber 65.
  • a small passage 66 in the air valve bushing 43 connects the chamber 65 to the handle passage 34 to allow a limited flow of the pressurised air into the chamber 65.
  • a much larger opening 67 in the air valve bushing 43 also allows the pressurised air to flow from the handle passage 34 into a chamber 68 formed between the air valve bushing 43 and the piston 41.
  • air pressure is normally balanced on both sides of the piston 41 and the piston 41 does not present an impediment to axial movement of the piston assembly 48 when the spray gun 10 is turned on or off by movement of either of the triggers 21 or 22.
  • the rear chamber 65 is connected through a passage 69 to a normally closed valve 70 (Figs. 4 and 5).
  • valve 70 opens and the chamber 65 is vented to atmosphere, establishing an air pressure differential across the piston 41.
  • the air pressure differential is sufficient to move the piston rearwardly until the collar 62 abuts the knob 15 and the valve needle 39 is fully opened.
  • Figs. 4 and 5 show details of the valve 70.
  • the passage 69 connects to a chamber 71 in the skeleton 28.
  • An annular ridge 72 surrounds the passage 69 to form a seat for the valve 70.
  • a compression spring 73 is compressed between the valve 70 and a retainer ring 74 to urge the valve 70 to seal against the ridge 72, closing the passage 69.
  • a push bar 25 is secured to the skeleton 28 to slide in an axial direction.
  • An end 76 on the valve 70 is engaged by a bumper 77 on the push bar 25.
  • a compression spring 78 urges the push bar 25 to the position shown in Fig. 4 wherein the push bar 25 does not affect closure of the valve 70.
  • the actuator arm 61 has a generally U-shaped body 85.
  • the body 85 consists of an upper portion 86 from which two sides 87 and 88 depend.
  • the sides 87 and 88 are spaced to straddle the skeleton 28.
  • Aligned openings 89 and 90 extend through the sides 87 and 88, respectively and a tubular portion 91 extends outwardly from each side 87 and 88 around the opening 89 or 90.
  • Each side 87 and 88 is shaped into a lower hooked shaped side portion 60 which terminates at a gap 92.
  • a rearwardly opening recess 93 is formed in the upper portion 86, as best seen in the cross section of Fig. 2.
  • Two aligned pins 94 are integrally formed on opposite sides of the skeleton 28 for mounting the actuator arm 61 and the trigger 21 (one of the pins 94 is shown in Fig. 7).
  • the actuator arm 61 is positioned to straddle the skeleton 28 with one of the pins 94 located in each opening 89 and 90 so that the actuator arm 61 can pivot on the gun body 11.
  • the trigger 21 has a U-shaped upper portion 95 with two parallel sides 96 which similarly straddle the actuator arm 61.
  • the two sides 96 have aligned openings 97 which engage the projections 91 on sides 87 and 88 of the actuator arm 61.
  • the openings 97 are formed with two overlapping lobes 98 and 99 with a small apex 100 on one side opposite a smoothly curved side 101.
  • the shape of the openings 97 permits the trigger 21 to be in a first position wherein the opening lobes 98 pivot on the projections 91 when the spray gun is in a first operating mode, as shown in Fig. 7.
  • the trigger 21 may be pushed upwardly until the projections 91 snap into the second lobe 99 to engage a second operating mode for the spray gun 10, as shown in Fig. 8. Or, the trigger 21 may be pulled downwardly to re-engage the first operating mode.
  • a push rod 103 extends between the recess 93 on the top of the actuator arm 61 and a recess 104 on the auxiliary trigger 22 (Fig. 2).
  • the push rod 103 is moved towards the front of the spray gun 10 to pivot the actuator arm 61. Consequently, either of the triggers 21 or 22 is capable of pivoting the actuator arm 61 for turning on the spray gun 10.
  • the amount of fluid discharged from the spray gun 10 will depend upon how far either trigger 21 or 22 is squeezed when the spray gun is in the first operating mode.
  • Fig. 8 is a fragmentary view showing details of the operation of the trigger 21 when positioned in the second operating mode.
  • the trigger 21 is pushed upwardly until the actuator arm projections 91 snap into the hole lobes 99 on the trigger sides 96.
  • the tabs 102 have the same radial spacing from the axis of the pins 94 and the projections 91 as the gaps 92 on the sides 60 of the actuator arm 61. Consequently, when the trigger 21 is squeezed towards the gun handle 16 (Figs. 1 and 2), the tabs 102 move into the gaps 92 and the actuator arm 61 is not pivoted to actuate the spray gun 10.
  • the trigger 21 is positioned as shown in Fig.
  • the trigger surface 79 contacts the push bar surface 80 and moves the push bar 25 for opening the valve 70, as shown in Figs. 8 and 10. Consequently, the spray gun 10 will be turned fully on by the resulting movement of the piston 41.
  • the auxiliary trigger 22 is still functional for operating the spray gun 10.
  • the trigger 21 has no separate return spring.
  • the spring 56 pushes the piston 41 to its normally closed position when the trigger 21 is released.
  • the force of the spring 56 through the piston 41, the air valve stem 49, the T-block 57 and the actuator arm 61 pivots the trigger 21 to its released position.
  • the trigger 21 is held in this position by friction.
  • the spring 78 moves the push bar 25 to its normal position when the trigger 21 is released.
  • the force of the spring 78 also pivots the trigger to its released position. Since the push bar 25 only moves a short distance when the trigger is squeezed to actuate the gun 10, the released trigger will be returned only a short distance. Consequently, the trigger 21 will be positioned close to the handle 16 and only require a short movement to turn on the spray gun 10 when operated in the second mode and only requires an operating force to overcome friction and the force of the springs 78 and 73.
  • Figs. 11 and 12 show a fragmentary portion of the spray gun 10 with the trigger 21 pivoted forward away from the handle 16 to open the area 27 between the handle 16 and the trigger 21.
  • Fig. 11 shows the trigger 21 positioned for the first operating mode and moved forward
  • Fig. 12 shows the trigger 21 positioned for the second operating mode and moved forward.
  • the trigger 21 is held in the forward position by friction or by a suitable detent (not shown).
  • a suitable detent not shown.
  • valve needle 39 has a diameter ⁇ 2.54 mm ( ⁇ 0.1 inch) at least at the seals to reduce friction. Further, at the seals the valve needle 39 should be polished to an average surface roughness of 0,38 ⁇ m ( ⁇ 15 micro inch).
  • the design of the trigger provides a mechanical advantage of about 7:1, while maintaining ergonomic trigger travel and form.
  • the air valve formed between the piston surface 40 and the air valve pushing surface 42 has a surface contour which allows full air flow with a shorter trigger travel.
  • the air valve is constructed to open at a rate which gives a ratio of 419 mm2 of air flow area per 25.4 mm of piston travel (square inches of flow area per inch of travel for the piston ⁇ 0.65), which is three times greater than a typical prior art trigger operated air atomization paint spray gun.
  • Fig. 13 shows details of the contours for a preferred design for fluid valve 110.
  • the chamber is curved with blend radii to a conic section 111 which connects to a straight section leading to the fluid discharge orifice 38.
  • the conic section 111 is in the form of a frustum of a right circular cone having slightly tapered side walls.
  • the valve needle 39 has at its forward end, a first conic section 112 which connects with a second, forward section 113.
  • the first conic section 112 is in the form of a frustum of a right circular cone having sides tapered at an angle less than the sides of the fluid head section 111.
  • the spray head conic section 111 is tapered to have an included vertex angle of about 20° and the valve needle conic section 112 is tapered to have an included vertex angle of about 12°.
  • the valve needle sections 112 and 113 join at an annulus 114 which is of a diameter to seat against a central region of the spray head section 111.
  • the forward valve needle section 113 is a cone terminating at a vertex 115.
  • the section 113 has a vertex angle of about 40°.
  • the forward sections 112 and 113 of the valve needle 39 may be formed of a low friction material to minimize friction when the annulus 114 is withdrawn from the spray head section 111 during triggering.
  • low friction seals 52 and 107 which have U-shaped cross sections are used to reduce drag forces between the valve needle 39 and the piston 41 and between the piston 41 and the air valve bushing 43, respectively.
  • the spray gun 10 may be constructed to require an actuating force no greater than 9 N (2 pounds) to actuate the gun 10 in the first operating mode and an actuating force no greater than 4,5 N (1 pound) when operating the gun in the second operating mode.
  • the trigger 21 pivots over an arc of at least 10° when operated in the first mode to permit accurate control of feathering and the trigger 21 pivots over an arc of less than 10° and preferably no greater than 5° when operated in the second mode.

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  • Nozzles (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Claims (10)

  1. Pistolet (10) de pulvérisation de liquide, se tenant à la main et comprenant un corps (11) de pistolet ayant des première (12) et seconde (14) extrémités, un ensemble (13) d'ajutage d'atomisation de liquide fixé à la première extrémité (12), une poignée (16) partant du voisinage de la seconde extrémité (14) pour tenir le pistolet de pulvérisation (10) et une gâchette principale (21) de commande de la décharge de liquide du pistolet de pulvérisation (10), la gâchette (21) du pistolet de pulvérisation ayant des premier et second modes de fonctionnement, des premiers moyens sensibles au mouvement de la gâchette pour faire varier la quantité de liquide déchargée par le pistolet de pulvérisation (10) en fonction du mouvement de la gâchette lorsque la gâchette (21) est en le premier mode de fonctionnement, caractérisé par des seconds moyens sensibles à un petit mouvement prédéterminé de la gâchette lorsque la gâchette est en le second mode de fonctionnement pour libérer totalement et couper le flux de liquide déchargé par le pistolet de pulvérisation.
  2. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 1, caractérisé par des moyens de montage de la gâchette (21) sur le corps (11) du pistolet pour lui permettre de pivoter en se rapprochant et en s'éloignant de la poignée (16) et en ce que la gâchette (21) pivote sur une plage d'au moins 10° lorsque la gâchette (21) est actionnée en le premier mode et en ce que la gâchette (21) pivote sur une plage inférieure à 10° lorsqu'elle est actionnée en le second mode.
  3. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 1, caractérisé en ce que la gâchette (21) pivote sur une plage qui ne dépasse pas 5° lorsqu'elle est actionnée en le second mode.
  4. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 2 et caractérisé en ce que la gâchette (21) exige une force d'actionnement qui n'est pas supérieure à 9 N en le premier mode de fonctionnement et exige une force d'actionnement qui n'est pas supérieure à 4,5 N en le second mode de fonctionnement.
  5. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 1 et comprenant un moyen à aiguille de soupape (39) monté dans le corps (11) du pistolet pour commander la décharge de liquide par le pistolet de pulvérisation (10), un moyen à tringlerie mécanique pour déplacer le moyen à aiguille de soupape (39) en réponse au mouvement de la gâchette (21) lorsque la gâchette est en le premier mode de fonctionnement, un moyen à piston (41) pour déplacer le moyen à aiguille de soupape (39) entre des positions d'ouverture et de fermeture et un moyen de soupape pour amener le moyen à piston (41) à déplacer le moyen à aiguille de soupape (39) vers la position d'ouverture lorsque la gâchette (21) est en le second mode de fonctionnement et pressée.
  6. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 5, caractérisé par des moyens de montage de la gâchette (21) sur le corps (11) pour lui permettre de pivoter de façon qu'elle se rapproche et s'éloigne de la poignée (16), la gâchette (21) ayant une première position par rapport à un point de pivotement sur le corps (11) du pistolet lorsqu'elle est en le premier mode de fonctionnement et la gâchette (21) ayant une seconde position par rapport au point de pivotement lorsqu'elle est en le second mode de fonctionnement.
  7. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 6, caractérisé en ce que la gâchette (21) est mobile dans une direction sensiblement radiale par rapport au point de pivotement entre les première et seconde positions et en ce qu'il comprend un moyen pour retenir la gâchette (21) à l'une sélectionnée des première et seconde positions.
  8. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 6, caractérisé par un moyen situé sur la gâchette (21) pour agir sur la tringlerie mécanique afin de commander le pistolet de pulvérisation (10) lorsque la gâchette (21) est à la première position, ainsi qu'un moyen situé sur la gâchette (21) pour actionner le moyen de soupape afin de commander le pistolet de pulvérisation lorsque la gâchette (21) est à la seconde position.
  9. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 5, caractérisé en ce que le moyen à piston (41) comprend un distributeur d'air monobloc avec lui pour commander un flux d'air d'atomisation et de formation d'une configuration qui se dirige sur l'ensemble d'ajutage (13), le moyen à piston (41) se déplaçant entre une première position à laquelle le distributeur d'air est fermé et une seconde position, le distributeur d'air s'ouvrant pour produire un flux d'air d'atomisation et de formation d'une configuration lorsque le piston (41) est déplacé pour être mis à une position intermédiaire comprise entre les première et seconde positions et un ressort de rappel (81) tendant à ramener le piston à la première position.
  10. Pistolet (10) de pulvérisation de liquide, se tenant à la main, selon la revendication 5, caractérisé par un moyen situé sur le piston (41) pour agir sur le moyen à aiguille de soupape (39) lorsque le piston (41) s'est déplacé vers la position intermédiaire et le piston (41) déplaçant le moyen à aiguille de soupape (39) vers la position d'ouverture lorsque le piston (41) est déplacé de la position intermédiaire à la seconde position.
EP93304087A 1992-05-27 1993-05-26 Pistolet de pulvérisation avec gâchette à double mode de fonctionnement Expired - Lifetime EP0572237B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US894730 1992-05-27
US07/894,730 US5236129A (en) 1992-05-27 1992-05-27 Ergonomic hand held paint spray gun
US48277 1993-04-14
US08/048,277 US5332159A (en) 1992-05-27 1993-04-14 Spray gun with dual mode trigger

Publications (2)

Publication Number Publication Date
EP0572237A1 EP0572237A1 (fr) 1993-12-01
EP0572237B1 true EP0572237B1 (fr) 1996-03-06

Family

ID=26725968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93304087A Expired - Lifetime EP0572237B1 (fr) 1992-05-27 1993-05-26 Pistolet de pulvérisation avec gâchette à double mode de fonctionnement

Country Status (6)

Country Link
EP (1) EP0572237B1 (fr)
JP (1) JPH0767545B2 (fr)
AT (1) ATE134905T1 (fr)
DE (1) DE69301683T2 (fr)
ES (1) ES2084452T3 (fr)
NO (1) NO931909L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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WO2023094665A1 (fr) * 2021-11-28 2023-06-01 J. Wagner Gmbh Procédé de commande d'un ventilateur sur un dispositif de pulvérisation, et dispositif de pulvérisation

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US5711485A (en) * 1995-11-27 1998-01-27 Ransburg Corporation Pneumatic trigger valve for spray gun
US7703702B2 (en) 2004-04-07 2010-04-27 Illinois Tool Works Inc. Pneumatically operated device having check valve vent and method for making same
ITRE20040033A1 (it) 2004-04-15 2004-07-15 Arrow Line Srl Valvola di intercettazione perfezionata per pistole da lavaggio di apparecchiature idropulitrici.
US9138762B2 (en) 2006-06-12 2015-09-22 Titan Tool, Inc. Texture spray gun
GB2457489B (en) * 2008-02-15 2012-10-31 Itw Ltd Adjustable needle seal
GB2457886A (en) 2008-02-26 2009-09-02 Itw Ltd Ball connector between manifold and spray head
AU2009335963B2 (en) 2008-12-18 2014-10-09 Graco Minnesota Inc. Tooless needle change spray gun
JP6554687B2 (ja) * 2014-08-06 2019-08-07 アネスト岩田株式会社 スプレーガン
US20180346177A1 (en) * 2017-06-06 2018-12-06 Greg Latimer Baffled cross-through liquid container
CN108405210A (zh) * 2018-04-28 2018-08-17 佛山市南海定融风动工具实业有限公司 一种压送式脱模手动喷枪
CN111515866B (zh) * 2020-06-08 2024-05-03 李森 一种新型手持式水刀切割枪

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US1694078A (en) * 1927-04-07 1928-12-04 Vilbiss Co Spray gun
US2149181A (en) * 1935-02-21 1939-02-28 Krautzberger Albert Spray gun for paints and the like
US3396911A (en) * 1964-01-27 1968-08-13 Edward O. Norris Spray gun activation mechanism
US3698644A (en) * 1971-02-17 1972-10-17 Economics Lab Combination aspirator and spray nozzle
US3801009A (en) * 1973-05-29 1974-04-02 J Marshall Applicator gun for applying hardenable plastic compositions containing fibers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023094665A1 (fr) * 2021-11-28 2023-06-01 J. Wagner Gmbh Procédé de commande d'un ventilateur sur un dispositif de pulvérisation, et dispositif de pulvérisation

Also Published As

Publication number Publication date
JPH06312148A (ja) 1994-11-08
DE69301683D1 (de) 1996-04-11
NO931909L (no) 1993-11-29
NO931909D0 (no) 1993-05-26
EP0572237A1 (fr) 1993-12-01
JPH0767545B2 (ja) 1995-07-26
ES2084452T3 (es) 1996-05-01
DE69301683T2 (de) 1996-07-18
ATE134905T1 (de) 1996-03-15

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